Letters: Since most computer scientists are male, I worry that the test is likely to favour an idea of conversation as being an information-focused activity rather than an interactive process which builds relationships between people

The private lives of the great inventors, discoverers and academics were often extraordinary. So it's not surprising that film-makers have been drawn to celebrate them and that actors have produced some terrific performances. Kit Buchan chooses the pick of the bunch over the years including Russell Crowe as John Nash and Walter Matthau as Einstein